Bertaľs Le De Boches

[gamary]

You might be right:
Zizi dit le tueur de Boches

Interesting. Zizi, in modern French, is a slang term probably best translated as willie/willy. Not exactly the surname you'd imagine for a book hero...

[arthur1966]

Oops! Probably was a little linguistic problem...I really do not know what is right. But maybe it will parfume.